CVE-2025-21764

In the Linux kernel, the following vulnerability has been resolved:

ndisc: use RCU protection in ndisc_alloc_skb()

ndisc_alloc_skb() can be called without RTNL or RCU being held.

Add RCU protection to avoid possible UAF.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
7.8 HIGH
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
LinuxCNA
---
---
CISA-ADPADP
7.8 HIGH
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 2%
VendorProductVersion
linuxlinux_kernel
3.9 ≤
𝑥
< 5.4.291
linuxlinux_kernel
5.5 ≤
𝑥
< 5.10.235
linuxlinux_kernel
5.11 ≤
𝑥
< 5.15.179
linuxlinux_kernel
5.16 ≤
𝑥
< 6.1.129
linuxlinux_kernel
6.2 ≤
𝑥
< 6.6.79
linuxlinux_kernel
6.7 ≤
𝑥
< 6.12.16
linuxlinux_kernel
6.13 ≤
𝑥
< 6.13.4
linuxlinux_kernel
6.14:rc1
linuxlinux_kernel
6.14:rc2
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
linux
bullseye
vulnerable
bullseye (security)
vulnerable
bookworm
6.1.129-1
fixed
bookworm (security)
vulnerable
trixie
6.12.20-1
fixed
sid
6.12.21-1
fixed
linux-6.1
bullseye (security)
6.1.129-1~deb11u1
fixed
Common Weakness Enumeration
Vulnerability Media Exposure
References
https://git.kernel.org/stable/c/3c2d705f5adf5d860aaef90cb4211c0fde2ba66d
https://git.kernel.org/stable/c/628e6d18930bbd21f2d4562228afe27694f66da9
https://git.kernel.org/stable/c/96fc896d0e5b37c12808df797397fb16f3080879
https://git.kernel.org/stable/c/9e0ec817eb41a55327a46cd3ce331a9868d60304
https://git.kernel.org/stable/c/b870256dd2a5648d5ed2f22316b3ac29a7e5ed63
https://git.kernel.org/stable/c/bbec88e4108e8d6fb468d3817fa652140a44ff28
https://git.kernel.org/stable/c/c30893ef3d9cde8e7e8e4fd06b53d2c935bbccb1
https://git.kernel.org/stable/c/cd1065f92eb7ff21b9ba5308a86f33d1670bf926